A friend told me about NAC as a method to combat Hot flashes that accompany menopause so I bought this and I have to say after using it consistently for over a month, it really has worked. I went from having several a day to none, pretty quickly, too. And I can tell when I've forgotten to take a tablet because I can feel the first stirrings of what used to become a flash, which reminds me to take the tablet and head it off at the pass. This is such a relief. Spontaneously breaking out in massive sweat is really not a lot of fun. Also? Not a great look. Glad to finally have something to battle back against such an annoying experience. As a side benefit, I've noticed my fingernails and hair are growing much faster, which is unexpected but nice